jdk8-mips64-public/hotspot: src/share/vm/classfile/sharedPathsMiscInfo.cpp@ac27a9c85bea

     1 /*

     2  * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 #include "precompiled.hpp"

    26 #include "classfile/classLoader.hpp"

    27 #include "classfile/classLoaderData.inline.hpp"

    28 #include "classfile/sharedPathsMiscInfo.hpp"

    29 #include "memory/allocation.inline.hpp"

    30 #include "memory/metaspaceShared.hpp"

    31 #include "runtime/arguments.hpp"

    33 void SharedPathsMiscInfo::add_path(const char* path, int type) {

    34   if (TraceClassPaths) {

    35     tty->print("[type=%s] ", type_name(type));

    36     trace_class_path("[Add misc shared path ", path);

    37   }

    38   write(path, strlen(path) + 1);

    39   write_jint(jint(type));

    40 }

    42 void SharedPathsMiscInfo::ensure_size(size_t needed_bytes) {

    43   assert(_allocated, "cannot modify buffer during validation.");

    44   int used = get_used_bytes();

    45   int target = used + int(needed_bytes);

    46   if (target > _buf_size) {

    47     _buf_size = _buf_size * 2 + (int)needed_bytes;

    48     _buf_start = REALLOC_C_HEAP_ARRAY(char, _buf_start, _buf_size, mtClass);

    49     _cur_ptr = _buf_start + used;

    50     _end_ptr = _buf_start + _buf_size;

    51   }

    52 }

    54 void SharedPathsMiscInfo::write(const void* ptr, size_t size) {

    55   ensure_size(size);

    56   memcpy(_cur_ptr, ptr, size);

    57   _cur_ptr += size;

    58 }

    60 bool SharedPathsMiscInfo::read(void* ptr, size_t size) {

    61   if (_cur_ptr + size <= _end_ptr) {

    62     memcpy(ptr, _cur_ptr, size);

    63     _cur_ptr += size;

    64     return true;

    65   }

    66   return false;

    67 }

    69 bool SharedPathsMiscInfo::fail(const char* msg, const char* name) {

    70   ClassLoader::trace_class_path(tty, msg, name);

    71   MetaspaceShared::set_archive_loading_failed();

    72   return false;

    73 }

    75 bool SharedPathsMiscInfo::check() {

    76   // The whole buffer must be 0 terminated so that we can use strlen and strcmp

    77   // without fear.

    78   _end_ptr -= sizeof(jint);

    79   if (_cur_ptr >= _end_ptr) {

    80     return fail("Truncated archive file header");

    81   }

    82   if (*_end_ptr != 0) {

    83     return fail("Corrupted archive file header");

    84   }

    86   while (_cur_ptr < _end_ptr) {

    87     jint type;

    88     const char* path = _cur_ptr;

    89     _cur_ptr += strlen(path) + 1;

    90     if (!read_jint(&type)) {

    91       return fail("Corrupted archive file header");

    92     }

    93     if (TraceClassPaths) {

    94       tty->print("[type=%s ", type_name(type));

    95       print_path(tty, type, path);

    96       tty->print_cr("]");

    97     }

    98     if (!check(type, path)) {

    99       if (!PrintSharedArchiveAndExit) {

   100         return false;

   101       }

   102     } else {

   103       trace_class_path("[ok");

   104     }

   105   }

   107   return true;

   108 }

   110 bool SharedPathsMiscInfo::check(jint type, const char* path) {

   111   switch (type) {

   112   case BOOT:

   113     if (strcmp(path, Arguments::get_sysclasspath()) != 0) {

   114       return fail("[BOOT classpath mismatch, actual: -Dsun.boot.class.path=", Arguments::get_sysclasspath());

   115     }

   116     break;

   117   case NON_EXIST: // fall-through

   118   case REQUIRED:

   119     {

   120       struct stat st;

   121       if (os::stat(path, &st) != 0) {

   122         // The file does not actually exist

   123         if (type == REQUIRED) {

   124           // but we require it to exist -> fail

   125           return fail("Required file doesn't exist");

   126         }

   127       } else {

   128         // The file actually exists

   129         if (type == NON_EXIST) {

   130           // But we want it to not exist -> fail

   131           return fail("File must not exist");

   132         }

   133         time_t    timestamp;

   134         long      filesize;

   136         if (!read_time(&timestamp) || !read_long(&filesize)) {

   137           return fail("Corrupted archive file header");

   138         }

   139         if (timestamp != st.st_mtime) {

   140           return fail("Timestamp mismatch");

   141         }

   142         if (filesize != st.st_size) {

   143           return fail("File size mismatch");

   144         }

   145       }

   146     }

   147     break;

   149   default:

   150     return fail("Corrupted archive file header");

   151   }

   153   return true;

   154 }

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